Global Patent Index - EP 2860201 A1

EP 2860201 A1 20150415 - High temperature resistant polyethylene and process for the production thereof

Title (en)

High temperature resistant polyethylene and process for the production thereof

Title (de)

Hochtemperaturbeständiges Polyethylen und Verfahren zu seiner Herstellung

Title (fr)

Polyéthylène résistant aux températures élevées et son procédé de production

Publication

EP 2860201 A1 20150415 (EN)

Application

EP 13004876 A 20131010

Priority

EP 13004876 A 20131010

Abstract (en)

The present invention is concerned with a polyethylene composition comprising a base resin having a density of more than 952.0 kg/m 3 and equal to or less than 957.0 kg/m 3 , wherein the composition has a melt flow rate MFR 5 of 0.12 to 0.21 g/10min and the polyethylene composition has a polydispersity index PI within the range of higher than 4.9 Pa -1 and equal to or less than 9.0 Pa -1 . Furthermore, the present invention concerns a polyethylene composition obtainable by a multistage process, the multistage process comprising polymerizing ethylene in the presence of a silica supported Ziegler Natta catalyst in a reactor cascade comprising a first loop reactor, a second loop reactor and a gas phase reactor for obtaining the base resin and then extruding the base resin together with stabilizers and carbon black into the polyethylene composition. Furthermore, the present invention relates to an article, such as a pipe, made from the polyethylene composition and the use of the polyethylene composition for the production of such an article.

IPC 8 full level

C08F 2/00 (2006.01); C08L 23/06 (2006.01); F16L 9/12 (2006.01)

CPC (source: EP)

C08F 210/16 (2013.01); C08L 23/06 (2013.01); C08L 2203/18 (2013.01); C08L 2205/025 (2013.01); F16L 9/12 (2013.01)

Citation (applicant)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 2860201 A1 20150415; AU 2014334201 A1 20160121; AU 2014334201 B2 20170316; CN 105658677 A 20160608; CN 105658677 B 20170915; EP 3055335 A1 20160817; EP 3055335 B1 20181212; JP 2016532760 A 20161020; KR 101785881 B1 20171016; KR 20160030981 A 20160321; PL 3055335 T3 20190830; SA 516370680 B1 20180723; WO 2015051880 A1 20150416

DOCDB simple family (application)

EP 13004876 A 20131010; AU 2014334201 A 20140924; CN 201480056064 A 20140924; EP 14776587 A 20140924; EP 2014002589 W 20140924; JP 2016539436 A 20140924; KR 20167003435 A 20140924; PL 14776587 T 20140924; SA 516370680 A 20160306